User's Manual

CHAPTER 5
RS-232C/422/485 INTERFACING
Revised: 27 Mar 01
5-4
RS-232C/422/485 Configuration Tables
On the front plate of the ESTeem is a two position
RS-232 Setup switch labeled SW. The switch positions
are defined as follows:
RS-232C/422/485
SETUP SWITCH TABLE
BIT 1 OFF Default baud rate 19.2K, N, 8, 1
BIT 1 ON Use software to select baud rate
BIT 2 OFF Enter Command Mode upon
initialization
BIT 2 ON Enter Conversation Mode upon
initialization
Note:
*
The ESTeem is configured at the factory for
RS-422 interfacing. RS-485 (2 or 4 wire) requires
internal jumper configuration. Please contact EST
Customer Support at 509-735-9092 for instruction
RS-232C/422/485 COMRATE Tables
The ESTeem Model 192 uses the COMRATE software
command to set the communication port speed when Bit
1 on the RS-232 Setup Switches is in the ON position.
The ESTeem Utility Program will calculate the required
COMRATE value and download to the ESTeem in Step
3 of the Starting Out Menu or by selecting
ESTeem
Setup>Configure ESTeem Serial Port
from the Terminal
Emulation menu. If you would like to manually enter the
command to set the serial port speed on the modem
please use the following table as a guideline:
19,200 9,600 4,800 2,400 1,200 600
0 12345
N,7,1
8 9 10 11 12 13
N,7,2
16 17 18 19 20 21
E,7,1
24 25 26 27 28 29
E,7,2
32 33 34 35 36 37
N,8,1
40 41 42 43 44 45
N,8,2
48 49 50 51 52 53
E,8,1
56 57 58 59 60 61
E,8,2
80 81 82 83 84 85
O,7,1
88 89 90 91 92 93
O,7,2
112 113 114 115 116 117
O,8,1
120 121 122 123 124 125
O,8,2
ESTeem RS-232C/422/485
Port Pin-Out Table
Pin No. Function
1
Shield Ground
2
Transmit Data (TxD)
3
Receive Data (RxD)
4
Request To Send (RTS Input)
5
Clear To Send (CTS)
6
Data Set Ready (DSR)
7
Signal Ground
8
Data Carrier Detect (DCD)
19
Mode Control
20
Data Terminal Ready (DTR)
22
Ring Indicator (RI)
12
Request To Send (RTS Output)
9*
RS-422/485 Transmit Data (-)
10*
RS-422/485 Transmit Data (+)
14*
RS-422/485 Receive Data (+)
16*
RS-422/485 Receive Data (-)
.